writeq/[1,2]

Synopsis

writeq(+Term)

writeq(+Stream, +Term)

Writes the term Term to Stream or the current output stream.

Arguments

Stream stream_object

a valid Prolog stream, which is open for output

Term term

the term to be written

Description

Equivalent to write_term/[2,3] with the options:

     [quoted(true),ignore_ops(false),numbervars(true)]
     

Does not terminate its output with a full-stop. Therefore, if you want this term to be input to read/[1,2], you must explicitly write a full-stop to mark the end of the term.

Comments

Depending upon whether character escaping is on or off, writeq/[1,2] and write_canonical/[1,2] behave differently when writing quoted atoms. If character escaping is on:

• The characters with ASCII codes 9 (horizontal tab), 32 (space), and 33 through 126 (non-layout characters) are written as themselves.
• The characters with ASCII codes 8, 10, 11, 12, 13, 27, and 127 are written in their \lowercase letter form (see above for the corresponding letter).
• The character with ASCII code 39 (single quote) is written as two consecutive single quotes.
• The character with ASCII code 92 (back slash) is written as two consecutive back slashes.
• All other characters are written in their \^control char form.

If character escaping is off:

• The character with ASCII code 39 (single quote) is written as two consecutive single quotes.
• All other characters are written as themselves.

Exceptions

Stream errors (see ref-iou-sfh-est)

See Also

write_term/[2,3], write/[1,2], write_canonical/[1,2] ref-syn-ces for information about character escaping.